MA or ma may stand for:

• ma, a two-letter English word meaning Mother
• Ma, transliteration of Chinese family name 馬,马,麻 etc.
• Ma (mythology)
• Magister Artium or Master of Arts (M.A.), see Master's degree
• Massachusetts (U.S. state)
• Mega-annum - millions of years
• milliampere (mA)
• Morocco (ISO country code)
• marketing automation
• MA is also a complexity class, comprising the languages decidable by interactive proof systems of the Merlin-Arthur type; see MA (complexity)
• Ma is the second syllable in Buddhist "Six syllable mantra" Om mani padme hum.
• Ma means space in Japanese, and often refers to silence in music. taiko
• MA is the moving average model in Statistics
• the IATA code for MALÉV Hungarian Airlines
• M.A. can stand for Marin Academy, a high school in San Rafael, California.